21142809

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{16661}}^1$

素因数の和:16717

約数の個数: 16

約数和(自身を含む): 31991040

約数和(自身を除く): 10848231

約数列:

[1, 3, 9, 27, 47, 141, 423, 1269, 16661, 49983, 149949, 449847, 783067, 2349201, 7047603, 21142809]

約数ペア:

[(1, 21142809), (3, 7047603), (9, 2349201), (27, 783067), (47, 449847), (141, 149949), (423, 49983), (1269, 16661)]